Mode of making turn-buckles



1V.[. KENNEDY.

(No Model.)

MODE OF MAKING TURN BUGKLES.

No, 395,281. Patented Dec. 25, 1888., Bali Warren STArns arnnr rrien.

MARTIN KENNEDY, OF HEGEIVISCH, ASSIGN OR TO THE UNITED STATES ROLLING STOCK COMPANY, OF CHICAGO, ILLINOIS.

MODE OF MAKING TURN-BUCKLES.

SPECIFICATION forming part Of Letters Patent No. 395,281, dated December 25, 1888. Application filed October 17, 1888- Serial No. 288,399. (No model.)

To aZZ whom it may concern.-

Be it known that I, MARTIN KENNEDY, a citizen of the United States, residing at Hegewiseh, in the county of Cook and State of Illinois, have invented a certain new and use ful Improvement in Turn-Buckles, which is fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure 1 is a View of one of the bars which I employ in carrying out my process, the same being shown in its straight condition before the first heating and bending; Fig. 2, a similar view showing the bar after the ends have been heated and bent; Fig. 3, an ed e view of the bar shown in Fig. 2; Fig. 4:, a view showing the turn-buckle in an unfinished state, one end being finished and the other ready for the final heating and swaging; Fig. 5, a view'of the finished turn-buckle; Fig. 6, a sectional view of the same, taken 011 the line 1. l of Fig. 5; and Fig. '7, an end view of the unfinished end shown in Fig. 4.

Like letters refer to like parts in all the ligures of the drawings.

\ly invention relates to the manufacture of turn-buckles,.and has for its object to simplify and consequently cheapen the construction of these articles.

To these ends my invention consists in certain. novel features, which I will now proceed to describe, and will then partiriaularly point out in the claims.

In the manufacture of i lllflbbllCklOS as now ordinarily conducted it is customary to take two flat iron bars and weld their ends to intermediate plugs placed between said ends and forming the body of the end of the turnbuckle. This makes a solid end at each end of the turn-buckle, and after reheating a hole is punched through each solid end by means of a powerful apparatus for this purpose. It will be seen that a large amount of waste metal is thus employed in the process of manufacturin now in use, and that a very powerful apparatus is necessary. llloreover, the proper heating of the various parts requires a great deal of time and fuel. It is to obviate these disadvantages that I have devised my present improved method, which is carried out in the following manner:

For the construction of each turn-buckle two fiat bars, A, having the form shown in Fig. 1, are employed, said bars having a length somewhat greater than the length of the finished turn-buckle. These bars are first heated at their ends, and the ends, when thus heated, are swaged or bent into the form shown in Figs. 2 and 3 of the drawings by dies or other suitable means. It will be observed that not only are the ends of the bars bent downward or offset, as shown at a, but this oifset portion is also given a transverse curvature, as shown more particularly in Fig. 7. Two of the bars having the form shown in Figs. 2 and 3 are placed together and then heated at one end. It will be observed that the curvature of the offset ends leaves a space, a, between the ends, so that the ends may be readily and quickly heated, the heat having access to both sides of the bars. \Vhen sufficiently heated, the ends of the two bars are placed .in a suitable die, and a punch is introduced and forced down between them through the opening a. This punch, in conjunction with the die, gives to the ends of the bars the form shown at the left end of Fig. 4 and at both ends of Figs. 5 and 0. The ends of the two bars are thoroughly welded together, and at the same time the opening a assumes the circular form shown in Fig. 6. The other ends of the bars are then similarly heated, placed in the die, and pun ched, thus completi ng the tu rn-buckle, which, when finished, has the form shown in Figs. 5 and 0.

It will be observed that all superfluous metal is entirely done away with in the method of construction just described. The plugs heretofore employed to form the ends or heads of the turn-buckle are entirely dispensed with, and only the metal originally in the bars is used. Moreover, the punch, instead of passing through a solid mass of metal to form the holes in the ends or heads, simply passes through and enlarges the opening a between the bent ends of the bars. Compared with the ordinary process, there is comparatively a small amount of metal to be heated, and that small amount can be heated much more thoroughly an d quickly, owing to the fact that the heat has access to all parts of the metal to be heated. The process consumes a smaller amount of time,there being less parts to handle, and they being more readily manipulated, heated, and punched. Owing to these advantages I am enabled to produce a much cheaper article without in any way sacrificing its quality.

It is obvious that various modifications in the details of construction and arrangement of the parts may'be made without departing from the principle of my invention, and I therefore do not wish to be understood as limiting myself strictly to the precise details hereinbefore described, and shown in the drawings.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The improvement in the art of manufacturing turn-buckles, which consists in first offset-ting the ends of two fiat bars and imparting to the said ends a transverse curvature and then welding together and shaping said ends, substantially as and for the purposes specified.

2. The improvement in the art of manufacturing turn-buckles, which consists in first offsetting and imparting atransverse curvature to the ends of two flat bars and then welding and shaping said ends by placing them in a suitable die and forcing a, plunger into the opening between them, substantially as and 0 for the purposes specified.

MARTIN KENNEDY.

Witnesses:

J. M. TEACHER, CARRIE FEIGEL. 

